package org.wuyichun.gift.controller;

import com.aliyun.oss.ClientException;
import com.aliyun.oss.OSS;
import com.aliyun.oss.OSSClientBuilder;
import com.aliyun.oss.OSSException;
import com.aliyun.oss.common.auth.*;
import com.aliyun.oss.common.utils.BinaryUtil;
import com.aliyun.oss.model.MatchMode;
import com.aliyun.oss.model.PolicyConditions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;
import org.wuyichun.gift.domain.AlicloudOSSProperties;
import org.wuyichun.gift.util.AjaxResult;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.util.Date;
import java.util.LinkedHashMap;
import java.util.Map;

@RequestMapping("/oss")
@RestController
public class OssController {
    @Autowired
    private AlicloudOSSProperties alicloudOSSProperties;
    @GetMapping("/sign")
    protected AjaxResult doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        System.out.println("--------进入");
        // Endpoint以华东1（杭州）为例，其他Region请按实际情况填写。
        String endpoint = alicloudOSSProperties.getEndpoint();
        // 填写Bucket名称，例如examplebucket。
        String bucket = alicloudOSSProperties.getBucketName();
        // 填写Host名称，格式为https://bucketname.endpoint。
        String host = "https://"+alicloudOSSProperties.getBucketName()+"."+alicloudOSSProperties.getEndpoint();
        // 设置上传到OSS文件的前缀，可置空此项。置空后，文件将上传至Bucket的根目录下。
        String dir = "image";

        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(endpoint, alicloudOSSProperties.getAccessKey(), alicloudOSSProperties.getSecretKey());
        try {
            long expireTime = 30;
            long expireEndTime = System.currentTimeMillis() + expireTime * 1000;
            Date expiration = new Date(expireEndTime);
            // PostObject请求最大可支持的文件大小为5 GB，即CONTENT_LENGTH_RANGE为5*1024*1024*1024。
            PolicyConditions policyConds = new PolicyConditions();
            policyConds.addConditionItem(PolicyConditions.COND_CONTENT_LENGTH_RANGE, 0, 1048576000);
            policyConds.addConditionItem(MatchMode.StartWith, PolicyConditions.COND_KEY, dir);

            String postPolicy = ossClient.generatePostPolicy(expiration, policyConds);
            byte[] binaryData = postPolicy.getBytes("utf-8");
            String encodedPolicy = BinaryUtil.toBase64String(binaryData);
            String postSignature = ossClient.calculatePostSignature(postPolicy);

            Map<String, String> respMap = new LinkedHashMap<String, String>();
            respMap.put("accessid", alicloudOSSProperties.getAccessKey());
            respMap.put("policy", encodedPolicy);
            respMap.put("signature", postSignature);
            respMap.put("dir", dir);
            respMap.put("host", host);
            respMap.put("expire", String.valueOf(expireEndTime / 1000));
            // respMap.put("expire", formatISO8601Date(expiration));
            return AjaxResult.me().setResultObj(respMap);
        } catch (Exception e) {
            // Assert.fail(e.getMessage());
            System.out.println(e.getMessage());
            return AjaxResult.me().setSuccess(false);
        } finally {
            ossClient.shutdown();
        }
    }
    @PostMapping
    public  AjaxResult delete(@RequestBody String urlString ){
        String fileName;

        try {
            String decodedString = URLDecoder.decode(urlString, "UTF-8");
            String[] parts = decodedString.split("/");
            fileName = parts[parts.length - 1];
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
            fileName = null;
        }

        System.out.println("File Name: " + fileName);
        String objectName = "image/"+fileName;
        objectName = objectName.substring(0, objectName.length() - 1);
        System.out.println(objectName);
        // 创建OSSClient实例。
        OSS ossClient = new OSSClientBuilder().build(alicloudOSSProperties.getEndpoint(), alicloudOSSProperties.getAccessKey(), alicloudOSSProperties.getSecretKey());
        try {
            // 删除文件或目录。如果要删除目录，目录必须为空。
            ossClient.deleteObject(alicloudOSSProperties.getBucketName(), objectName);
            return AjaxResult.me().setSuccess(true);
        } catch (OSSException oe) {
            System.out.println("Caught an OSSException, which means your request made it to OSS, "
                    + "but was rejected with an error response for some reason.");
            System.out.println("Error Message:" + oe.getErrorMessage());
            System.out.println("Error Code:" + oe.getErrorCode());
            System.out.println("Request ID:" + oe.getRequestId());
            System.out.println("Host ID:" + oe.getHostId());
            return AjaxResult.me().setMessage("操作错误");
        } catch (ClientException ce) {
            System.out.println("Caught an ClientException, which means the client encountered "
                    + "a serious internal problem while trying to communicate with OSS, "
                    + "such as not being able to access the network.");
            System.out.println("Error Message:" + ce.getMessage());

            return AjaxResult.me().setMessage("操作错误");
        } finally {
            if (ossClient != null) {
                ossClient.shutdown();
            }
        }
    }
}
